Automobile-alarm.



nl. nu 9 l 5y v. o N D E T N E T A D..

.Im 1... 4 .uw 9 6 8 U H AUTOMOBILE ALARM.

APPLIoATIoN FILED In 24. was.

w he Lfgy.

Pi-iTENT OFFICE.

JOHN K. STEWART, Olf CHICAGO, ILllNOlS.

AUTOMOBILE-ALARM.

Tc'all' 'whom 'it may Be it known that I, JOHN K. STEWART, a citizen of the United States, residing at Chicago, in the county 'nf Cook end steile nf nlinnie, have invented new and useful Improvements in Automobile-Alarms, of which the following is a specification, reference being had to the accompanying'drawings, forming a part thereof.

The purpose of this invention is to provide a device adapted to sound a longrlistance alarm tobe given by an automobile utilizing the device, being of the nature of a siren operated by the exhaust. from the vehicle motor, ,from which it willfbe understood that it is designed to beused on vehicles employing` a fluid. motor, eitherexplosive or steam engine. It consists of the featul'es of construction and combination set out in 'the claims. l

In the drawings:-Figure 1 is'a vertical axial section o a device embodying this`inverition. Fig. 2 is a rear side elevation of the same. Fig. 3 is a section at the line 3 3. en rig. 1. The construction of the siren wheel itself, so far asits ,capcity for producing sound is concerned, is shown' and claimed'n my pendingapplication, Serial No.

n 308,390, siea'unreii 2s, 1906, and the device in niet respect is not claimed in l:his application. Certain details of the mounting of'the siren wheel in its case are` modied in adapting it to be operated in the manner involved in the present invention, and for the purpose of these features will be described. A supporting standard or bsserl,` adapted te be mounted in any convenientmanner upon the body of the vehicle,

supports the case of the siren wheel, which may be integral with the This case comprises a skeleton diaphragm' or spokes, 2', connecting the peripheral flange, 3, with 'a central stud or bearing piece, 4, which supports the bearings of the shaft, 5, of the siren wheel. A desirable construction for this post is that shown, in which it is open axially fiom end to end, and has screwed into its opposite ends the ba1lretaining ele- `'with suitable dianieter to admit the post, 4, over which it is passed inorder to receive the protruding end of the shaft, to which itis made last by a pln, 5*, as illususted. The einen wheel, .in addition in its hellen hub just described, comprises the diaphragm or hack plate, 9, radial varies, 10, 10, and an apertured peripheral flange consisting of the short segments, l1, 11, extending circur'nierentially one way from the ends oi Specification of Letters Patent. i Application filed Mey 24. isos. serial 110.318.465.

Patented Nev. 5, ,1907.

the several vanes, leaving apertures, 11, between the end of each and the next vane corresponding to apertures, 3, in the circumferential flange, V3, oi the siren Wheel case, which are readily opened and closed by the rotation of the siren wheel within the case' as the flange segments, 11, ll, alternately cover and uncover these apertures, causing, when the rotation is suiciently rapid, a musical note with pitch varying with the speed, and loudne varying with the size of the device and the speed. l O r. the back of the diaphragm, 9, oi the siren wheel, there is mounted and may be formed integrally a turbine motorelement or wheel, l2, which, as illustrated, is an annular device, so made because it is to be mounted on the siren wheel and carried by the motor for the siren wheel is not laimed in this applicationl but only its association with the siren wheel and in the manner and for the purpose indicated. Upon each, or upon as many as desired, of the. spokes, 2, constituting the skeleton diaphragm of the siren wheel case. there is mounted a jet nozzle, 15, which trends obliqilelywith respect'to the plane of rotation of the wheel and turbine element for directing a fluid jet' into or against the pocket vanes for imparting rotary motion to the device. The discharge end oi the nozzle is beveled ofi' so that lit lies against and covers a considerable number o the pocket vancs for directing the jet into them and the exhaust from them taking place readily, the reaction against the air in such exhaust operating as a driving force upon the 'pockets as well as the direct impact of the jet.

The particular form of motor wheel for operation by the tiuid jet is subject to modification, not being itself a part o1' the present invention.

1S represents a pipe for conducting the exhaust fluid from the vehicle motor (notl shown) to the nozzles; and for so conducting the uid to all the nozzles, it is connected directly to an annular pipe, 14, to which all the nozzles-are connected at their base. This pipe may be formed as an integral part of the skeleton diaphragm. of the case. i

1. An alarm-sounding devlce'ror a. uidmotor-propelled vehicle, comprising` a siren wheei and its esse adapted besormded by 'the air drawn into the siren wheel by its owl rotation and having peripheral apertures for the discharge of the air to produce the sound; a uid0pernted motor elementzrigid with auch siren wheel independent o1' the sound-producing device ot the latter and having its ilo passages non-romlnunicating with the air pxsmsjns of the lmckets opening; :may from said aimed side o' me *bei und toward the rinsed side of the'cnse. um Huid-jet n-nies mounted uu thv mso fur directin: jets inw the m--tctlement pockets. the mme haring ln-ripin-a-n. apertures ior l5 '-xlmust uf the mutive Huid through the packen ln uminpim 'lu-rwf. l have hereums set my hand t'. hienum illinois, this 19th day of May. A. Il. 190|.

JOHN K. STEWART 'itnenses:

(Ixus. S. Brutos. l M. Gszmcm: Am'. 

